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<head><meta charset="utf-8"><title>Nightly · project-portable-simd · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/index.html">project-portable-simd</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html">Nightly</a></h3>

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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244041144" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244041144">(Jun 27 2021 at 00:04)</a>:</h4>
<p>I'm thinking about getting the ball rolling on getting to nightly, first step adding the feature to rustc and linking it to a tracking issue or whatever.  We had discussed <code>stdsimd_mod</code> in the past but any thoughts on using <code>portable_simd</code>?  Seems like the best choice to me</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244041156" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244041156">(Jun 27 2021 at 00:04)</a>:</h4>
<p>"yes this feature enables the unstable portable SIMD components"</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244045952" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244045952">(Jun 27 2021 at 02:37)</a>:</h4>
<p>Also, shall I write up a tracking issue?  That actually seems to be the first step, since it's what's passed to <code>#[unstable]</code> <span aria-label="upside down" class="emoji emoji-1f643" role="img" title="upside down">:upside_down:</span></p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244045964" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244045964">(Jun 27 2021 at 02:37)</a>:</h4>
<p>There is a general SIMD tracking issue, but I don't think that's the right place to track our progress</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046354" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jubilee <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046354">(Jun 27 2021 at 02:50)</a>:</h4>
<p><span class="user-mention silent" data-user-id="312331">Caleb Zulawski</span> <a href="#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244045964">said</a>:</p>
<blockquote>
<p>There is a general SIMD tracking issue, but I don't think that's the right place to track our progress</p>
</blockquote>
<p>It's not, no.</p>
<p><span class="user-mention silent" data-user-id="312331">Caleb Zulawski</span> <a href="#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244045952">said</a>:</p>
<blockquote>
<p>Also, shall I write up a tracking issue?  That actually seems to be the first step, since it's what's passed to <code>#[unstable]</code> <span aria-label="upside down" class="emoji emoji-1f643" role="img" title="upside down">:upside_down:</span></p>
</blockquote>
<p>I generally see that happen as a step between opening a PR and it being accepted, as out of order as that may sound.</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046361" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jubilee <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046361">(Jun 27 2021 at 02:51)</a>:</h4>
<p>and passing "none" for a half-second until then.</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046408" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046408">(Jun 27 2021 at 02:52)</a>:</h4>
<p>Generally yes, though I poked around and found a couple tracking issues attached to RFCs with no PRs yet (and that was said explicitly in that section)</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046454" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046454">(Jun 27 2021 at 02:54)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/86555">#86555</a> for example</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046468" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jubilee <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046468">(Jun 27 2021 at 02:55)</a>:</h4>
<p>those have RFCs attached instead <span aria-label="grinning face with smiling eyes" class="emoji emoji-1f601" role="img" title="grinning face with smiling eyes">:grinning_face_with_smiling_eyes:</span></p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046471" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046471">(Jun 27 2021 at 02:55)</a>:</h4>
<p>We actually do have an RFC! it just needs to be very modified :)</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046524" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046524">(Jun 27 2021 at 02:57)</a>:</h4>
<p>I'm ok with reversing the order if for some reason we think we absolutely must, but I think we can probably just open a tracking issue now, it's not like there's any question of if there's going to be one eventually</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046579" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jubilee <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046579">(Jun 27 2021 at 02:59)</a>:</h4>
<p>yeah I don't think it actually matters.</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046699" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046699">(Jun 27 2021 at 03:03)</a>:</h4>
<p>I'll just open the tracking issue then, we can always update it with whatever ends up being relevant</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046749" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046749">(Jun 27 2021 at 03:04)</a>:</h4>
<p>The tracking issue template seems to indicate <code>issue=none</code> is really supposed to be for small features without an rfc</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046943" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jubilee <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046943">(Jun 27 2021 at 03:11)</a>:</h4>
<p>mmm, that's not how it gets used in practice, even small features get tracking issues. it's basically a placeholder or for internal-unstable things.</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244046995" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244046995">(Jun 27 2021 at 03:12)</a>:</h4>
<p>yeah that too</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244047468" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244047468">(Jun 27 2021 at 03:28)</a>:</h4>
<p><span class="user-mention" data-user-id="281757">@Jubilee</span> thoughts on using <code>portable_simd</code> instead of <code>stdsimd_mod</code> or anything like that?</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244047471" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244047471">(Jun 27 2021 at 03:28)</a>:</h4>
<p>Not sure if we even thought of that?</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244047474" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244047474">(Jun 27 2021 at 03:28)</a>:</h4>
<p>Even though it's the name of the RFC and project group...</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244047917" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244047917">(Jun 27 2021 at 03:45)</a>:</h4>
<p>Oh the existing RFC uses <code>portable_packed_vector_types</code></p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244047970" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jubilee <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244047970">(Jun 27 2021 at 03:48)</a>:</h4>
<p>oh that sounds fine... uh, not the latter</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048007" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048007">(Jun 27 2021 at 03:48)</a>:</h4>
<p>agreed :) though it's also accurate</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048009" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048009">(Jun 27 2021 at 03:48)</a>:</h4>
<p>just wordy...</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048131" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Lokathor <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048131">(Jun 27 2021 at 03:53)</a>:</h4>
<p>const generics has enough sub features that there's a tracking issue just for all the other tracking issues</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048135" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Lokathor <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048135">(Jun 27 2021 at 03:53)</a>:</h4>
<p>so we can always just have more tracking issues</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048136" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Boxy [she/her] <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048136">(Jun 27 2021 at 03:53)</a>:</h4>
<p>wait really? what issue is that</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048192" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Lokathor <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048192">(Jun 27 2021 at 03:55)</a>:</h4>
<p>oh oops it's const fn that has the meta issue</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048196" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Lokathor <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048196">(Jun 27 2021 at 03:55)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/57563">https://github.com/rust-lang/rust/issues/57563</a></p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048235" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Boxy [she/her] <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048235">(Jun 27 2021 at 03:56)</a>:</h4>
<p>oh my ...</p>



<a name="244048236"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048236" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048236">(Jun 27 2021 at 03:56)</a>:</h4>
<p>wow</p>



<a name="244048252"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048252" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Lokathor <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048252">(Jun 27 2021 at 03:57)</a>:</h4>
<p>yeah so, we already have portable simd stages planned, we should feel free enough to use more than one issue</p>



<a name="244048287"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048287" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Caleb Zulawski <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048287">(Jun 27 2021 at 03:58)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/86656">#86656</a></p>



<a name="244048293"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/257879-project-portable-simd/topic/Nightly/near/244048293" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Lokathor <a href="https://rust-lang.github.io/zulip_archive/stream/257879-project-portable-simd/topic/Nightly.html#244048293">(Jun 27 2021 at 03:58)</a>:</h4>
<p>"be in nightly"<br>
"stabilize types with minimum ops"<br>
"stabilize more ops"<br>
etc</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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